package Expe13;

import java.util.Locale;

/**
 * @Author 28021
 * @Date 2022/12/6
 */
public class T10 {
    public static void main(String[] args) {
        System.out.println("My name".toUpperCase());
        System.out.println("My name".toLowerCase());
        System.out.println("My name".concat(" is"));
    }
}
